This is embossing powder. I do not emboss much, but keep this stuff around in varying colors to knead into polymer for a variety of effects. Not long ago I had this particular bottle out and sitting on my dining table as I stood and multitasked around my chair.
I was so focused on what I was doing with my hands that I forgot two huge rules of crafting. One, do not wear bulky clothing, and two, always keep the lid on bottles of tiny things. Powder counts as a tiny thing. LOTS of tiny things, actually.
Yes, I raised my head and bellowed upward: NOOOOOOOOOOOOO!
At least my reaction kept the cats out of the mess long enough to clean it up.